Function background_thread_enable 

pub fn background_thread_enable(enable: bool) -> Result<bool, Error>

Enables or disables jemalloc’s background purge workers.

Enabling creates workers on demand. Disabling waits for existing workers to terminate before returning. The previous setting is returned. If jemalloc reports a worker-management failure, the requested setting can still have taken effect. A child process starts with workers disabled after fork, regardless of the parent setting. The control exists only on selected pthread-based platforms.

Errors

Returns an error if jemalloc rejects the read or update.